Duncan Bay Weather Forecast
- 57
- 64
Rain Showers
- 58
- 68
Rain Showers
- 57
- 72
Mostly Cloudy
- 57
- 70
Partly Sunny
- 59
- 72
Slight Chance Thunderstorms
- 58
- 74
Chance Rain Showers
Today 22 Jul Keweenaw
Partly cloudy. A chance of Showers with a slight chance of Thunderstorms this afternoon. Near steady temperature in the lower 70s. South Winds 5 to 10 Mph. Chance of rain 50 percent.
Tonight 22 Jul Keweenaw
Mostly cloudy with a chance of Thunderstorms. A chance of Showers in the Evening, then Showers likely after midnight. Lows around 61 inland to around 67 at the shore. South Winds 5 to 10 Mph, becoming southwest after midnight. Chance of rain 70 percent.
Duncan Bay Temperature Statistics
July Temperature
Copper Harbor (55.9 miles)
Lowest 7 July, 2025
49.6 °FAverage July
64.5 °FHighest 13 July, 2025
85.6 °F
Climate (2020–Present)
Copper Harbor (55.9 miles)
Average Low 2020–2025
38.5 °FAverage 2020–2025
44.6 °FAverage High 2020–2025
50.8 °F